We ___ not leave the door open at night. MCQ with Answer and Explanation

We ___ not leave the door open at night.

A. must

B. can

C. may

D. should

Answer: Option A

'Must not' security.

This question belongs to: English Modals

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Question #1 Report Error

I ___ not remember his name at the moment.

A. must

B. can

C. should

D. may

Correct Answer: Option B

Explanation:
'Cannot' temporary inability.

This question belongs to: English Modals

Question #2 Report Error

He ___ have won the race if he hadn't fallen.

A. would

B. may

C. will

D. can

Correct Answer: Option A

Explanation:
Third conditional: 'would have'.

This question belongs to: English Modals

Question #3 Report Error

You ___ not speak with your mouth full.

A. may

B. can

C. need

D. must

Correct Answer: Option D

Explanation:
'Must not' for social rule.

This question belongs to: English Modals